Floor slab construction



May 7, 1935. F. M. VENZIE FLOOR SLAB CONSTRUCTION Filed Dec. 5, 1931 1 NV EN TOR. FFEDE/FICKMZZA/Z/E i L TTORNEY.

Patented May 7, 1935 UNITED STATES 2,000,116 FLOOR SLAB CONSTRUCTIONFrederick M. Venzie, Philadelphia, Pa., assignor to National GypsumCompany, Buffalo, N. Y., a corporation of Delaware Application December5, 1931, Serial No. 579,326."

7 Claims.

This invention, generally stated, relates to a building structure andhas more especial relation to a floor slab construction. In. the layingof floor slabs upon floor beams it frequently happens that the workmenfind that the ends of adjacent slabs instead of resting upon the upperflanges of the I-beams come to rest intermediate of adjacent floorbeams. The result is that the floor slabs at these particular juncturesare apt to sag, and in fact do sag.

The leading object of the present invention may be said to reside in theprovision of a floor construction in which the above recited faults areovercome and a floor of pre-cast slabs provided in which adjacent endsof floor slabs are interlocked with respect to one another at pointsunsupported by the floor beams.

A further object of the present invention is to provide a pre-cast slabin which channel irons are embedded both at the ends and the sides ofthe slabs, whereby the channel irons of adjacent slabs may haveinterlocked relation one with another.

A still further object of the present invention is to provide as a newarticle of manufacture a pre-cast slab both the ends and sides of whichhave embedded therein channel irons, which channel irons are connectedby longitudinally and laterally extended reinforcing bars.

A still further object of the present invention is to'provide aconstruction of the character stated in which the pre-cast slabs ininterlocked relation by means of channel irons may be coupled togetherat their adjacent ends by means of tie-pieces.

A further object of the present invention is to provide a constructionof the character stated in which tie-bands of integral structure areutilized for coupling together adjacent ends of pre-' cast slabs atpoints in which the slab ends span floor beams.

A still further object of the present invention is to provide astructure of the character stated in which pre-cast slabs havinginterlocked channel irons in their sides and ends are coupled togetherboth longitudinally and laterally considered by means of detachableauxiliary securing devices.

Other and further objects of the present invention reside in theprovision of general details of construction and in the arrangement,connection, and combination of parts for attaining the results sought bythe foregoing objects.

The invention consists of the novel construction hereinafter describedand finally claimed.

The nature, characteristic features and scope of the invention willbemore fully understood from the following description taken in.connec-; tion with the accompanying drawing forming part thereof, andin which:

Fig. 1 is a top or plan View of a pre-cast slab embodying the invention;

Fig. 2 is a longitudinal sectional view.-taken upon the line 22 of Fig.1; 1

Fig. 3 is a view in cross-section taken upon the line 3'3 of Fig. 1;

Fig. i is .a view principally in section illustrating the pre-cast slabsas supported upon floor beams;

Fig. 5 is a view in cross-section taken upon the line 55 of Fig. 6;

Fig. 6 is a fragmentary View in plan hereinafter referred to;

Fig. 7 is a View in section taken upon the'line l1 of Fig. 6; and

Fig. 8 is a view in perspective of band shown in Figs. 6 and'7.

For the purpose of illustrating my invention I have shown in theaccompanying drawing one formthereof which is at present preferredby me,since the same has been found in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumen talities of which my invention consists can be variouslyarranged and organized andthat my invention is not limited to theprecisearrangement and organization of the instrumentalities as hereinshown and described.

Referring to the drawing in detail, and with especial relation to Fig.1, the reference numeral It designates a plurality of pre-cast slabsarranged side by side and in practice are supported the attaching uponfloor beams ll, best seen in Fig. 4. Each pre-cast slab It at its endhas embedded therein a channel iron [2. These channel irons are ofdifferent cross-sectional areas, as best seen in Fig. 2, for a purposepresently to appear. Each slab It has embedded in its sideslongitudinally extended channel irons l3 similar in all respects tochannel irons 12. As clearly shown in Fig. 2, the channel irons l2 areconnected together by a longitudinally extended reinforcing bar l4embedded in the slab l9. As clearly shown in Fig. 1, the channel irons13 are connected by cross bars l5 embedded in a slab Ill. In practicethe slabs it are arranged upon upper flanges of the floor beams H asshown in Fig. 4. The workman in general practice finds that the floorbeams l l are not equally spaced, and it frequently happens that theends of the slabs span an open space between adjacent floor beams. Byreason of my construction when this occurs the end channel irons l2 fitone within another, as clearly shown in Fig. 3, to form an interlockbetween ends of adjacent slabs. Each slab end is vertically perforatedas at l6, see Fig. 3, and is cut away thereabove as at H. I introducethrough these vertical apertures l5 tie-pieces designated 18 formed ofwire, the terminals of which after passing through the apertures 16 aretwisted together as at l9 within the slotted portions [1 of the slabends, thereby to tie or couple together adjacent ends of slabs H). Inpractice the slottedportions H are filled with cernentitious materialafter the tie-pieces are adjusted. Laterally considered the pre-castslabs Ill are coupled together by means of metal bands 20, best seen inFig. 8. Each band comprises an integral structure having struck out atone end thereof a tongue 2|, and provided at its other end with anaperture 22, whereby when the band 20 is caused toengage around adjacentslabs 10,. as best seen in Figs. 6 and '7, the aperture 22 of the band20 may be inserted over a tongue 21 and the tongue 2| bent to form aninterlock. In order to facilitate theintroduction of the bands 20 withrespect to the slabs In the sides of the slabs are cut away as at 23. Asshown in Fig. 5, staples 24 are introduced through the cut away parts 23to couple together the interlocked parts of the channel irons. Inpractice the cut away parts 23 are filled in with cementitious materialwhen the flooring is complete.

While I have used the term channel iron, I wish it understood that anyother form of metal support may be employed.

What is claimed is: i

1. In a building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, achannel iron embedded in each slab side, adjacentchannelirons of adjacent slabs be.- ing arranged tolie one within theother when said slabs are positioned side by side.

' 2. Ina building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, theadjacentchannel irons of adjacent slabs being arranged .to lie onewithin the other when said slabs are positioned side by side, andreinforcing rods embedded in each ,slab extended longitudinally andlaterally for tying together the channel irons embedded in each slab.

3. In a building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, the channelirons of adjacent slabs being arranged to have interlocking relationwhen said slabs are positioned side by side, and detachable means forsecuring together adjacent ends of said slabs at the place of interlock.

4. In a building construction of the character "stated, fl'oor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, the channelirons of adjacent slabs being of different sized cross-sectional areasand arranged to have male and female interlocking relation when saidslabs are positioned side by side.

5. In a building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, the channelirons ofadjacent slabs being arranged to have interlocking relation whensaid slabs are positioned side by side, the ends of said slabs beingapertured vertically to accommodate tie-pieces, and tie-pieces forcoupling together adjacent ends of said slabs.

6. In a building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, the channelirons of adjacent slabs being arranged to have interlocking relationwhen said slabs are positioned side by side, and detachable bands forinterlocking connection around said slabs at the places where saidchannel irons interlock.

'7. In a building construction of the character stated, floor beams,pre-cast floor slabs supported by said beams, a channel iron embedded ineach slab end, a channel iron embedded in each slab side, the channelirons of adjacent slabs being arranged to have interlocking relationwhen said slabs are positioned side by side, and detachable means forsecuring together adjacent ends of said slabs at the place of interlock,said slabs being cut away to accommodate insertion of said detachablemeans.

FREDERICK M. VENZIE.

